图片:https://imgur.com/a/nHDOd
https://imgur.com/a/DpA0s
问题一: did you not hear = did not you hear = didn't you hear吗?
问题二: 为什么回答可以no然后接I did，不是应该接 yes, I did吗?
请大大们帮小弟解惑，穴穴